Fix nits in aomenc help message

Remove spaces at the end of lines. Add a missing closing parenthesis.

Change-Id: I82d67b792f1e1f9a4e93dc4dbba0294c63ec01a4
diff --git a/apps/aomenc.c b/apps/aomenc.c
index 80d36c4..98af610 100644
--- a/apps/aomenc.c
+++ b/apps/aomenc.c
@@ -430,7 +430,7 @@
 static const arg_def_t *no_args[] = { NULL };
 
 static void show_help(FILE *fout, int shorthelp) {
-  fprintf(fout, "Usage: %s <options> -o dst_filename src_filename \n",
+  fprintf(fout, "Usage: %s <options> -o dst_filename src_filename\n",
           exec_name);
 
   if (shorthelp) {
diff --git a/av1/arg_defs.c b/av1/arg_defs.c
index 8d5727a..1e6cd1f 100644
--- a/av1/arg_defs.c
+++ b/av1/arg_defs.c
@@ -140,7 +140,7 @@
   .debugmode =
       ARG_DEF("D", "debug", 0, "Debug mode (makes output deterministic)"),
   .outputfile = ARG_DEF("o", "output", 1, "Output filename"),
-  .use_yv12 = ARG_DEF(NULL, "yv12", 0, "Input file is YV12 "),
+  .use_yv12 = ARG_DEF(NULL, "yv12", 0, "Input file is YV12"),
   .use_i420 = ARG_DEF(NULL, "i420", 0, "Input file is I420 (default)"),
   .use_i422 = ARG_DEF(NULL, "i422", 0, "Input file is I422"),
   .use_i444 = ARG_DEF(NULL, "i444", 0, "Input file is I444"),
@@ -191,7 +191,7 @@
                                         "chroma subsampling y value."),
 
   .usage = ARG_DEF("u", "usage", 1,
-                   "Usage profile number to use (0: good, 1: rt, 2: allintra"),
+                   "Usage profile number to use (0: good, 1: rt, 2: allintra)"),
   .threads = ARG_DEF("t", "threads", 1, "Max number of threads to use"),
   .profile = ARG_DEF(NULL, "profile", 1, "Bitstream profile number to use"),
   .width = ARG_DEF("w", "width", 1, "Frame width"),